Hemiplegia is most often caused by thrombosis of:

Hemiplegia occurs most commonly due to occlusion of middle cerebral aery. Paraplegia occurs due to occlusion of anterior cerebral aery. Posterior cerebral aery occlusion leads to Homonymous visual-field cut, usually a complete hemianopia Macular or central field sparing can occur if the occipital pole remains intact through blood supply from a branch of the middle cerebral aery.